| 1 | /* |
| 2 | * Windows Television (WTV) demuxer |
| 3 | * Copyright (c) 2010-2011 Peter Ross <pross@xvid.org> |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * @file |
| 24 | * Windows Television (WTV) demuxer |
| 25 | * @author Peter Ross <pross@xvid.org> |
| 26 | */ |
| 27 | |
| 28 | #include <inttypes.h> |
| 29 | |
| 30 | #include "libavutil/channel_layout.h" |
| 31 | #include "libavutil/intreadwrite.h" |
| 32 | #include "libavutil/intfloat.h" |
| 33 | #include "avformat.h" |
| 34 | #include "internal.h" |
| 35 | #include "wtv.h" |
| 36 | #include "mpegts.h" |
| 37 | |
| 38 | /* Macros for formating GUIDs */ |
| 39 | #define PRI_PRETTY_GUID \ |
| 40 | "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x" |
| 41 | #define ARG_PRETTY_GUID(g) \ |
| 42 | AV_RL32(g),AV_RL16(g+4),AV_RL16(g+6),g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15] |
| 43 | #define LEN_PRETTY_GUID 34 |
| 44 | |
| 45 | /* |
| 46 | * |
| 47 | * File system routines |
| 48 | * |
| 49 | */ |
| 50 | |
| 51 | typedef struct { |
| 52 | AVIOContext *pb_filesystem; /**< file system (AVFormatContext->pb) */ |
| 53 | |
| 54 | int sector_bits; /**< sector shift bits; used to convert sector number into pb_filesystem offset */ |
| 55 | uint32_t *sectors; /**< file allocation table */ |
| 56 | int nb_sectors; /**< number of sectors */ |
| 57 | |
| 58 | int error; |
| 59 | int64_t position; |
| 60 | int64_t length; |
| 61 | } WtvFile; |
| 62 | |
| 63 | static int64_t seek_by_sector(AVIOContext *pb, int64_t sector, int64_t offset) |
| 64 | { |
| 65 | return avio_seek(pb, (sector << WTV_SECTOR_BITS) + offset, SEEK_SET); |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * @return bytes read, 0 on end of file, or <0 on error |
| 70 | */ |
| 71 | static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size) |
| 72 | { |
| 73 | WtvFile *wf = opaque; |
| 74 | AVIOContext *pb = wf->pb_filesystem; |
| 75 | int nread = 0; |
| 76 | |
| 77 | if (wf->error || pb->error) |
| 78 | return -1; |
| 79 | if (wf->position >= wf->length || avio_feof(pb)) |
| 80 | return 0; |
| 81 | |
| 82 | buf_size = FFMIN(buf_size, wf->length - wf->position); |
| 83 | while(nread < buf_size) { |
| 84 | int n; |
| 85 | int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1)); |
| 86 | int read_request = FFMIN(buf_size - nread, remaining_in_sector); |
| 87 | |
| 88 | n = avio_read(pb, buf, read_request); |
| 89 | if (n <= 0) |
| 90 | break; |
| 91 | nread += n; |
| 92 | buf += n; |
| 93 | wf->position += n; |
| 94 | if (n == remaining_in_sector) { |
| 95 | int i = wf->position >> wf->sector_bits; |
| 96 | if (i >= wf->nb_sectors || |
| 97 | (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) && |
| 98 | seek_by_sector(pb, wf->sectors[i], 0) < 0)) { |
| 99 | wf->error = 1; |
| 100 | break; |
| 101 | } |
| 102 | } |
| 103 | } |
| 104 | return nread; |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * @return position (or file length) |
| 109 | */ |
| 110 | static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence) |
| 111 | { |
| 112 | WtvFile *wf = opaque; |
| 113 | AVIOContext *pb = wf->pb_filesystem; |
| 114 | |
| 115 | if (whence == AVSEEK_SIZE) |
| 116 | return wf->length; |
| 117 | else if (whence == SEEK_CUR) |
| 118 | offset = wf->position + offset; |
| 119 | else if (whence == SEEK_END) |
| 120 | offset = wf->length; |
| 121 | |
| 122 | wf->error = offset < 0 || offset >= wf->length || |
| 123 | seek_by_sector(pb, wf->sectors[offset >> wf->sector_bits], |
| 124 | offset & ((1 << wf->sector_bits) - 1)) < 0; |
| 125 | wf->position = offset; |
| 126 | return offset; |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * read non-zero integers (le32) from input stream |
| 131 | * @param pb |
| 132 | * @param[out] data destination |
| 133 | * @param count maximum number of integers to read |
| 134 | * @return total number of integers read |
| 135 | */ |
| 136 | static int read_ints(AVIOContext *pb, uint32_t *data, int count) |
| 137 | { |
| 138 | int i, total = 0; |
| 139 | for (i = 0; i < count; i++) { |
| 140 | if ((data[total] = avio_rl32(pb))) |
| 141 | total++; |
| 142 | } |
| 143 | return total; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * Open file |
| 148 | * @param first_sector First sector |
| 149 | * @param length Length of file (bytes) |
| 150 | * @param depth File allocation table depth |
| 151 | * @return NULL on error |
| 152 | */ |
| 153 | static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s) |
| 154 | { |
| 155 | AVIOContext *pb; |
| 156 | WtvFile *wf; |
| 157 | uint8_t *buffer; |
| 158 | int64_t size; |
| 159 | |
| 160 | if (seek_by_sector(s->pb, first_sector, 0) < 0) |
| 161 | return NULL; |
| 162 | |
| 163 | wf = av_mallocz(sizeof(WtvFile)); |
| 164 | if (!wf) |
| 165 | return NULL; |
| 166 | |
| 167 | if (depth == 0) { |
| 168 | wf->sectors = av_malloc(sizeof(uint32_t)); |
| 169 | if (!wf->sectors) { |
| 170 | av_free(wf); |
| 171 | return NULL; |
| 172 | } |
| 173 | wf->sectors[0] = first_sector; |
| 174 | wf->nb_sectors = 1; |
| 175 | } else if (depth == 1) { |
| 176 | wf->sectors = av_malloc(WTV_SECTOR_SIZE); |
| 177 | if (!wf->sectors) { |
| 178 | av_free(wf); |
| 179 | return NULL; |
| 180 | } |
| 181 | wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4); |
| 182 | } else if (depth == 2) { |
| 183 | uint32_t sectors1[WTV_SECTOR_SIZE / 4]; |
| 184 | int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4); |
| 185 | int i; |
| 186 | |
| 187 | wf->sectors = av_malloc_array(nb_sectors1, 1 << WTV_SECTOR_BITS); |
| 188 | if (!wf->sectors) { |
| 189 | av_free(wf); |
| 190 | return NULL; |
| 191 | } |
| 192 | wf->nb_sectors = 0; |
| 193 | for (i = 0; i < nb_sectors1; i++) { |
| 194 | if (seek_by_sector(s->pb, sectors1[i], 0) < 0) |
| 195 | break; |
| 196 | wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4); |
| 197 | } |
| 198 | } else { |
| 199 | av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth); |
| 200 | av_free(wf); |
| 201 | return NULL; |
| 202 | } |
| 203 | wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS; |
| 204 | |
| 205 | if (!wf->nb_sectors) { |
| 206 | av_free(wf->sectors); |
| 207 | av_free(wf); |
| 208 | return NULL; |
| 209 | } |
| 210 | |
| 211 | size = avio_size(s->pb); |
| 212 | if (size >= 0 && (int64_t)wf->sectors[wf->nb_sectors - 1] << WTV_SECTOR_BITS > size) |
| 213 | av_log(s, AV_LOG_WARNING, "truncated file\n"); |
| 214 | |
| 215 | /* check length */ |
| 216 | length &= 0xFFFFFFFFFFFF; |
| 217 | if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) { |
| 218 | av_log(s, AV_LOG_WARNING, "reported file length (0x%"PRIx64") exceeds number of available sectors (0x%"PRIx64")\n", length, (int64_t)wf->nb_sectors << wf->sector_bits); |
| 219 | length = (int64_t)wf->nb_sectors << wf->sector_bits; |
| 220 | } |
| 221 | wf->length = length; |
| 222 | |
| 223 | /* seek to initial sector */ |
| 224 | wf->position = 0; |
| 225 | if (seek_by_sector(s->pb, wf->sectors[0], 0) < 0) { |
| 226 | av_free(wf->sectors); |
| 227 | av_free(wf); |
| 228 | return NULL; |
| 229 | } |
| 230 | |
| 231 | wf->pb_filesystem = s->pb; |
| 232 | buffer = av_malloc(1 << wf->sector_bits); |
| 233 | if (!buffer) { |
| 234 | av_free(wf->sectors); |
| 235 | av_free(wf); |
| 236 | return NULL; |
| 237 | } |
| 238 | |
| 239 | pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf, |
| 240 | wtvfile_read_packet, NULL, wtvfile_seek); |
| 241 | if (!pb) { |
| 242 | av_free(buffer); |
| 243 | av_free(wf->sectors); |
| 244 | av_free(wf); |
| 245 | } |
| 246 | return pb; |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Open file using filename |
| 251 | * @param[in] buf directory buffer |
| 252 | * @param buf_size directory buffer size |
| 253 | * @param[in] filename |
| 254 | * @param filename_size size of filename |
| 255 | * @return NULL on error |
| 256 | */ |
| 257 | static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size) |
| 258 | { |
| 259 | const uint8_t *buf_end = buf + buf_size; |
| 260 | |
| 261 | while(buf + 48 <= buf_end) { |
| 262 | int dir_length, name_size, first_sector, depth; |
| 263 | uint64_t file_length; |
| 264 | const uint8_t *name; |
| 265 | if (ff_guidcmp(buf, ff_dir_entry_guid)) { |
| 266 | av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; " |
| 267 | "remaining directory entries ignored\n", FF_ARG_GUID(buf)); |
| 268 | break; |
| 269 | } |
| 270 | dir_length = AV_RL16(buf + 16); |
| 271 | file_length = AV_RL64(buf + 24); |
| 272 | name_size = 2 * AV_RL32(buf + 32); |
| 273 | if (name_size < 0) { |
| 274 | av_log(s, AV_LOG_ERROR, |
| 275 | "bad filename length, remaining directory entries ignored\n"); |
| 276 | break; |
| 277 | } |
| 278 | if (48 + (int64_t)name_size > buf_end - buf) { |
| 279 | av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n"); |
| 280 | break; |
| 281 | } |
| 282 | first_sector = AV_RL32(buf + 40 + name_size); |
| 283 | depth = AV_RL32(buf + 44 + name_size); |
| 284 | |
| 285 | /* compare file name; test optional null terminator */ |
| 286 | name = buf + 40; |
| 287 | if (name_size >= filename_size && |
| 288 | !memcmp(name, filename, filename_size) && |
| 289 | (name_size < filename_size + 2 || !AV_RN16(name + filename_size))) |
| 290 | return wtvfile_open_sector(first_sector, file_length, depth, s); |
| 291 | |
| 292 | buf += dir_length; |
| 293 | } |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | #define wtvfile_open(s, buf, buf_size, filename) \ |
| 298 | wtvfile_open2(s, buf, buf_size, filename, sizeof(filename)) |
| 299 | |
| 300 | /** |
| 301 | * Close file opened with wtvfile_open_sector(), or wtv_open() |
| 302 | */ |
| 303 | static void wtvfile_close(AVIOContext *pb) |
| 304 | { |
| 305 | WtvFile *wf = pb->opaque; |
| 306 | av_free(wf->sectors); |
| 307 | av_freep(&pb->opaque); |
| 308 | av_freep(&pb->buffer); |
| 309 | av_free(pb); |
| 310 | } |
| 311 | |
| 312 | /* |
| 313 | * |
| 314 | * Main demuxer |
| 315 | * |
| 316 | */ |
| 317 | |
| 318 | typedef struct { |
| 319 | int seen_data; |
| 320 | } WtvStream; |
| 321 | |
| 322 | typedef struct { |
| 323 | AVIOContext *pb; /**< timeline file */ |
| 324 | int64_t epoch; |
| 325 | int64_t pts; /**< pts for next data chunk */ |
| 326 | int64_t last_valid_pts; /**< latest valid pts, used for interative seeking */ |
| 327 | |
| 328 | /* maintain private seek index, as the AVIndexEntry->pos is relative to the |
| 329 | start of the 'timeline' file, not the file system (AVFormatContext->pb) */ |
| 330 | AVIndexEntry *index_entries; |
| 331 | int nb_index_entries; |
| 332 | unsigned int index_entries_allocated_size; |
| 333 | } WtvContext; |
| 334 | |
| 335 | /* WTV GUIDs */ |
| 336 | static const ff_asf_guid EVENTID_SubtitleSpanningEvent = |
| 337 | {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A}; |
| 338 | static const ff_asf_guid EVENTID_LanguageSpanningEvent = |
| 339 | {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95}; |
| 340 | static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent = |
| 341 | {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E}; |
| 342 | static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent = |
| 343 | {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24}; |
| 344 | static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent = |
| 345 | {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66}; |
| 346 | static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent = |
| 347 | {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}; |
| 348 | static const ff_asf_guid EVENTID_StreamIDSpanningEvent = |
| 349 | {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE}; |
| 350 | static const ff_asf_guid EVENTID_TeletextSpanningEvent = |
| 351 | {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3}; |
| 352 | static const ff_asf_guid EVENTID_AudioTypeSpanningEvent = |
| 353 | {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3}; |
| 354 | |
| 355 | /* Windows media GUIDs */ |
| 356 | |
| 357 | /* Media types */ |
| 358 | static const ff_asf_guid mediasubtype_mpeg1payload = |
| 359 | {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70}; |
| 360 | static const ff_asf_guid mediatype_mpeg2_sections = |
| 361 | {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5}; |
| 362 | static const ff_asf_guid mediatype_mpeg2_pes = |
| 363 | {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; |
| 364 | static const ff_asf_guid mediatype_mstvcaption = |
| 365 | {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1}; |
| 366 | |
| 367 | /* Media subtypes */ |
| 368 | static const ff_asf_guid mediasubtype_dvb_subtitle = |
| 369 | {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F}; |
| 370 | static const ff_asf_guid mediasubtype_teletext = |
| 371 | {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; |
| 372 | static const ff_asf_guid mediasubtype_dtvccdata = |
| 373 | {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A}; |
| 374 | static const ff_asf_guid mediasubtype_mpeg2_sections = |
| 375 | {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61}; |
| 376 | |
| 377 | static int read_probe(AVProbeData *p) |
| 378 | { |
| 379 | return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX; |
| 380 | } |
| 381 | |
| 382 | /** |
| 383 | * Convert win32 FILETIME to ISO-8601 string |
| 384 | * @return <0 on error |
| 385 | */ |
| 386 | static int filetime_to_iso8601(char *buf, int buf_size, int64_t value) |
| 387 | { |
| 388 | time_t t = (value / 10000000LL) - 11644473600LL; |
| 389 | struct tm *tm = gmtime(&t); |
| 390 | if (!tm) |
| 391 | return -1; |
| 392 | strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t)); |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string |
| 398 | * @return <0 on error |
| 399 | */ |
| 400 | static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value) |
| 401 | { |
| 402 | time_t t = (value / 10000000LL) - 719162LL*86400LL; |
| 403 | struct tm *tm = gmtime(&t); |
| 404 | if (!tm) |
| 405 | return -1; |
| 406 | strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t)); |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | /** |
| 411 | * Convert OLE DATE to ISO-8601 string |
| 412 | * @return <0 on error |
| 413 | */ |
| 414 | static int oledate_to_iso8601(char *buf, int buf_size, int64_t value) |
| 415 | { |
| 416 | time_t t = (av_int2double(value) - 25569.0) * 86400; |
| 417 | struct tm *result= gmtime(&t); |
| 418 | if (!result) |
| 419 | return -1; |
| 420 | strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", result); |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length) |
| 425 | { |
| 426 | char mime[1024]; |
| 427 | char description[1024]; |
| 428 | unsigned int filesize; |
| 429 | AVStream *st; |
| 430 | int ret; |
| 431 | int64_t pos = avio_tell(pb); |
| 432 | |
| 433 | avio_get_str16le(pb, INT_MAX, mime, sizeof(mime)); |
| 434 | if (strcmp(mime, "image/jpeg")) |
| 435 | goto done; |
| 436 | |
| 437 | avio_r8(pb); |
| 438 | avio_get_str16le(pb, INT_MAX, description, sizeof(description)); |
| 439 | filesize = avio_rl32(pb); |
| 440 | if (!filesize) |
| 441 | goto done; |
| 442 | |
| 443 | st = avformat_new_stream(s, NULL); |
| 444 | if (!st) |
| 445 | goto done; |
| 446 | av_dict_set(&st->metadata, "title", description, 0); |
| 447 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| 448 | st->codec->codec_id = AV_CODEC_ID_MJPEG; |
| 449 | st->id = -1; |
| 450 | ret = av_get_packet(pb, &st->attached_pic, filesize); |
| 451 | if (ret < 0) |
| 452 | goto done; |
| 453 | st->attached_pic.stream_index = st->index; |
| 454 | st->attached_pic.flags |= AV_PKT_FLAG_KEY; |
| 455 | st->disposition |= AV_DISPOSITION_ATTACHED_PIC; |
| 456 | done: |
| 457 | avio_seek(pb, pos + length, SEEK_SET); |
| 458 | } |
| 459 | |
| 460 | static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length) |
| 461 | { |
| 462 | int buf_size; |
| 463 | char *buf; |
| 464 | |
| 465 | if (!strcmp(key, "WM/MediaThumbType")) { |
| 466 | avio_skip(pb, length); |
| 467 | return; |
| 468 | } |
| 469 | |
| 470 | buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1; |
| 471 | buf = av_malloc(buf_size); |
| 472 | if (!buf) |
| 473 | return; |
| 474 | |
| 475 | if (type == 0 && length == 4) { |
| 476 | snprintf(buf, buf_size, "%u", avio_rl32(pb)); |
| 477 | } else if (type == 1) { |
| 478 | avio_get_str16le(pb, length, buf, buf_size); |
| 479 | if (!strlen(buf)) { |
| 480 | av_free(buf); |
| 481 | return; |
| 482 | } |
| 483 | } else if (type == 3 && length == 4) { |
| 484 | strcpy(buf, avio_rl32(pb) ? "true" : "false"); |
| 485 | } else if (type == 4 && length == 8) { |
| 486 | int64_t num = avio_rl64(pb); |
| 487 | if (!strcmp(key, "WM/EncodingTime") || |
| 488 | !strcmp(key, "WM/MediaOriginalBroadcastDateTime")) { |
| 489 | if (filetime_to_iso8601(buf, buf_size, num) < 0) { |
| 490 | av_free(buf); |
| 491 | return; |
| 492 | } |
| 493 | } else if (!strcmp(key, "WM/WMRVEncodeTime") || |
| 494 | !strcmp(key, "WM/WMRVEndTime")) { |
| 495 | if (crazytime_to_iso8601(buf, buf_size, num) < 0) { |
| 496 | av_free(buf); |
| 497 | return; |
| 498 | } |
| 499 | } else if (!strcmp(key, "WM/WMRVExpirationDate")) { |
| 500 | if (oledate_to_iso8601(buf, buf_size, num) < 0 ) { |
| 501 | av_free(buf); |
| 502 | return; |
| 503 | } |
| 504 | } else if (!strcmp(key, "WM/WMRVBitrate")) |
| 505 | snprintf(buf, buf_size, "%f", av_int2double(num)); |
| 506 | else |
| 507 | snprintf(buf, buf_size, "%"PRIi64, num); |
| 508 | } else if (type == 5 && length == 2) { |
| 509 | snprintf(buf, buf_size, "%u", avio_rl16(pb)); |
| 510 | } else if (type == 6 && length == 16) { |
| 511 | ff_asf_guid guid; |
| 512 | avio_read(pb, guid, 16); |
| 513 | snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid)); |
| 514 | } else if (type == 2 && !strcmp(key, "WM/Picture")) { |
| 515 | get_attachment(s, pb, length); |
| 516 | av_freep(&buf); |
| 517 | return; |
| 518 | } else { |
| 519 | av_freep(&buf); |
| 520 | av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length); |
| 521 | avio_skip(pb, length); |
| 522 | return; |
| 523 | } |
| 524 | |
| 525 | av_dict_set(&s->metadata, key, buf, 0); |
| 526 | av_freep(&buf); |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * Parse metadata entries |
| 531 | */ |
| 532 | static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb) |
| 533 | { |
| 534 | ff_asf_guid guid; |
| 535 | int length, type; |
| 536 | while(!avio_feof(pb)) { |
| 537 | char key[1024]; |
| 538 | ff_get_guid(pb, &guid); |
| 539 | type = avio_rl32(pb); |
| 540 | length = avio_rl32(pb); |
| 541 | if (!length) |
| 542 | break; |
| 543 | if (ff_guidcmp(&guid, ff_metadata_guid)) { |
| 544 | av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; " |
| 545 | "remaining metadata entries ignored\n", FF_ARG_GUID(guid)); |
| 546 | break; |
| 547 | } |
| 548 | avio_get_str16le(pb, INT_MAX, key, sizeof(key)); |
| 549 | get_tag(s, pb, key, type, length); |
| 550 | } |
| 551 | |
| 552 | ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv); |
| 553 | } |
| 554 | |
| 555 | /** |
| 556 | * parse VIDEOINFOHEADER2 structure |
| 557 | * @return bytes consumed |
| 558 | */ |
| 559 | static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st) |
| 560 | { |
| 561 | WtvContext *wtv = s->priv_data; |
| 562 | AVIOContext *pb = wtv->pb; |
| 563 | |
| 564 | avio_skip(pb, 72); // picture aspect ratio is unreliable |
| 565 | st->codec->codec_tag = ff_get_bmp_header(pb, st, NULL); |
| 566 | |
| 567 | return 72 + 40; |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * Parse MPEG1WAVEFORMATEX extradata structure |
| 572 | */ |
| 573 | static void parse_mpeg1waveformatex(AVStream *st) |
| 574 | { |
| 575 | /* fwHeadLayer */ |
| 576 | switch (AV_RL16(st->codec->extradata)) { |
| 577 | case 0x0001 : st->codec->codec_id = AV_CODEC_ID_MP1; break; |
| 578 | case 0x0002 : st->codec->codec_id = AV_CODEC_ID_MP2; break; |
| 579 | case 0x0004 : st->codec->codec_id = AV_CODEC_ID_MP3; break; |
| 580 | } |
| 581 | |
| 582 | st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */ |
| 583 | |
| 584 | /* dwHeadMode */ |
| 585 | switch (AV_RL16(st->codec->extradata + 6)) { |
| 586 | case 1 : |
| 587 | case 2 : |
| 588 | case 4 : st->codec->channels = 2; |
| 589 | st->codec->channel_layout = AV_CH_LAYOUT_STEREO; |
| 590 | break; |
| 591 | case 8 : st->codec->channels = 1; |
| 592 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; |
| 593 | break; |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | /** |
| 598 | * Initialise stream |
| 599 | * @param st Stream to initialise, or NULL to create and initialise new stream |
| 600 | * @return NULL on error |
| 601 | */ |
| 602 | static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type) |
| 603 | { |
| 604 | if (st) { |
| 605 | if (st->codec->extradata) { |
| 606 | av_freep(&st->codec->extradata); |
| 607 | st->codec->extradata_size = 0; |
| 608 | } |
| 609 | } else { |
| 610 | WtvStream *wst = av_mallocz(sizeof(WtvStream)); |
| 611 | if (!wst) |
| 612 | return NULL; |
| 613 | st = avformat_new_stream(s, NULL); |
| 614 | if (!st) { |
| 615 | av_free(wst); |
| 616 | return NULL; |
| 617 | } |
| 618 | st->id = sid; |
| 619 | st->priv_data = wst; |
| 620 | } |
| 621 | st->codec->codec_type = codec_type; |
| 622 | st->need_parsing = AVSTREAM_PARSE_FULL; |
| 623 | avpriv_set_pts_info(st, 64, 1, 10000000); |
| 624 | return st; |
| 625 | } |
| 626 | |
| 627 | /** |
| 628 | * parse Media Type structure and populate stream |
| 629 | * @param st Stream, or NULL to create new stream |
| 630 | * @param mediatype Mediatype GUID |
| 631 | * @param subtype Subtype GUID |
| 632 | * @param formattype Format GUID |
| 633 | * @param size Size of format buffer |
| 634 | * @return NULL on error |
| 635 | */ |
| 636 | static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid, |
| 637 | ff_asf_guid mediatype, ff_asf_guid subtype, |
| 638 | ff_asf_guid formattype, uint64_t size) |
| 639 | { |
| 640 | WtvContext *wtv = s->priv_data; |
| 641 | AVIOContext *pb = wtv->pb; |
| 642 | if (!ff_guidcmp(subtype, ff_mediasubtype_cpfilters_processed) && |
| 643 | !ff_guidcmp(formattype, ff_format_cpfilters_processed)) { |
| 644 | ff_asf_guid actual_subtype; |
| 645 | ff_asf_guid actual_formattype; |
| 646 | |
| 647 | if (size < 32) { |
| 648 | av_log(s, AV_LOG_WARNING, "format buffer size underflow\n"); |
| 649 | avio_skip(pb, size); |
| 650 | return NULL; |
| 651 | } |
| 652 | |
| 653 | avio_skip(pb, size - 32); |
| 654 | ff_get_guid(pb, &actual_subtype); |
| 655 | ff_get_guid(pb, &actual_formattype); |
| 656 | avio_seek(pb, -size, SEEK_CUR); |
| 657 | |
| 658 | st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32); |
| 659 | avio_skip(pb, 32); |
| 660 | return st; |
| 661 | } else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) { |
| 662 | st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO); |
| 663 | if (!st) |
| 664 | return NULL; |
| 665 | if (!ff_guidcmp(formattype, ff_format_waveformatex)) { |
| 666 | int ret = ff_get_wav_header(pb, st->codec, size); |
| 667 | if (ret < 0) |
| 668 | return NULL; |
| 669 | } else { |
| 670 | if (ff_guidcmp(formattype, ff_format_none)) |
| 671 | av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
| 672 | avio_skip(pb, size); |
| 673 | } |
| 674 | |
| 675 | if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) { |
| 676 | st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample); |
| 677 | } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) { |
| 678 | if (st->codec->extradata && st->codec->extradata_size >= 22) |
| 679 | parse_mpeg1waveformatex(st); |
| 680 | else |
| 681 | av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n"); |
| 682 | } else { |
| 683 | st->codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype); |
| 684 | if (st->codec->codec_id == AV_CODEC_ID_NONE) |
| 685 | av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype)); |
| 686 | } |
| 687 | return st; |
| 688 | } else if (!ff_guidcmp(mediatype, ff_mediatype_video)) { |
| 689 | st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO); |
| 690 | if (!st) |
| 691 | return NULL; |
| 692 | if (!ff_guidcmp(formattype, ff_format_videoinfo2)) { |
| 693 | int consumed = parse_videoinfoheader2(s, st); |
| 694 | avio_skip(pb, FFMAX(size - consumed, 0)); |
| 695 | } else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) { |
| 696 | uint64_t consumed = parse_videoinfoheader2(s, st); |
| 697 | /* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */ |
| 698 | avio_skip(pb, FFMAX(size - consumed, 0)); |
| 699 | } else { |
| 700 | if (ff_guidcmp(formattype, ff_format_none)) |
| 701 | av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
| 702 | avio_skip(pb, size); |
| 703 | } |
| 704 | |
| 705 | if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) { |
| 706 | st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype)); |
| 707 | } else { |
| 708 | st->codec->codec_id = ff_codec_guid_get_id(ff_video_guids, subtype); |
| 709 | } |
| 710 | if (st->codec->codec_id == AV_CODEC_ID_NONE) |
| 711 | av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype)); |
| 712 | return st; |
| 713 | } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) && |
| 714 | !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) { |
| 715 | st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
| 716 | if (!st) |
| 717 | return NULL; |
| 718 | if (ff_guidcmp(formattype, ff_format_none)) |
| 719 | av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
| 720 | avio_skip(pb, size); |
| 721 | st->codec->codec_id = AV_CODEC_ID_DVB_SUBTITLE; |
| 722 | return st; |
| 723 | } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) && |
| 724 | (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) { |
| 725 | st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
| 726 | if (!st) |
| 727 | return NULL; |
| 728 | if (ff_guidcmp(formattype, ff_format_none)) |
| 729 | av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
| 730 | avio_skip(pb, size); |
| 731 | st->codec->codec_id = !ff_guidcmp(subtype, mediasubtype_teletext) ? AV_CODEC_ID_DVB_TELETEXT : AV_CODEC_ID_EIA_608; |
| 732 | return st; |
| 733 | } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) && |
| 734 | !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) { |
| 735 | if (ff_guidcmp(formattype, ff_format_none)) |
| 736 | av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
| 737 | avio_skip(pb, size); |
| 738 | return NULL; |
| 739 | } |
| 740 | |
| 741 | av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID |
| 742 | ", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n", |
| 743 | FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype)); |
| 744 | avio_skip(pb, size); |
| 745 | return NULL; |
| 746 | } |
| 747 | |
| 748 | enum { |
| 749 | SEEK_TO_DATA = 0, |
| 750 | SEEK_TO_PTS, |
| 751 | }; |
| 752 | |
| 753 | /** |
| 754 | * Try to seek over a broken chunk |
| 755 | * @return <0 on error |
| 756 | */ |
| 757 | static int recover(WtvContext *wtv, uint64_t broken_pos) |
| 758 | { |
| 759 | AVIOContext *pb = wtv->pb; |
| 760 | int i; |
| 761 | for (i = 0; i < wtv->nb_index_entries; i++) { |
| 762 | if (wtv->index_entries[i].pos > broken_pos) { |
| 763 | int ret = avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET); |
| 764 | if (ret < 0) |
| 765 | return ret; |
| 766 | wtv->pts = wtv->index_entries[i].timestamp; |
| 767 | return 0; |
| 768 | } |
| 769 | } |
| 770 | return AVERROR(EIO); |
| 771 | } |
| 772 | |
| 773 | /** |
| 774 | * Parse WTV chunks |
| 775 | * @param mode SEEK_TO_DATA or SEEK_TO_PTS |
| 776 | * @param seekts timestamp |
| 777 | * @param[out] len_ptr Length of data chunk |
| 778 | * @return stream index of data chunk, or <0 on error |
| 779 | */ |
| 780 | static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr) |
| 781 | { |
| 782 | WtvContext *wtv = s->priv_data; |
| 783 | AVIOContext *pb = wtv->pb; |
| 784 | while (!avio_feof(pb)) { |
| 785 | ff_asf_guid g; |
| 786 | int len, sid, consumed; |
| 787 | |
| 788 | ff_get_guid(pb, &g); |
| 789 | len = avio_rl32(pb); |
| 790 | if (len < 32) { |
| 791 | int ret; |
| 792 | if (avio_feof(pb)) |
| 793 | return AVERROR_EOF; |
| 794 | av_log(s, AV_LOG_WARNING, "encountered broken chunk\n"); |
| 795 | if ((ret = recover(wtv, avio_tell(pb) - 20)) < 0) |
| 796 | return ret; |
| 797 | continue; |
| 798 | } |
| 799 | sid = avio_rl32(pb) & 0x7FFF; |
| 800 | avio_skip(pb, 8); |
| 801 | consumed = 32; |
| 802 | |
| 803 | if (!ff_guidcmp(g, ff_SBE2_STREAM_DESC_EVENT)) { |
| 804 | if (ff_find_stream_index(s, sid) < 0) { |
| 805 | ff_asf_guid mediatype, subtype, formattype; |
| 806 | int size; |
| 807 | avio_skip(pb, 28); |
| 808 | ff_get_guid(pb, &mediatype); |
| 809 | ff_get_guid(pb, &subtype); |
| 810 | avio_skip(pb, 12); |
| 811 | ff_get_guid(pb, &formattype); |
| 812 | size = avio_rl32(pb); |
| 813 | parse_media_type(s, 0, sid, mediatype, subtype, formattype, size); |
| 814 | consumed += 92 + size; |
| 815 | } |
| 816 | } else if (!ff_guidcmp(g, ff_stream2_guid)) { |
| 817 | int stream_index = ff_find_stream_index(s, sid); |
| 818 | if (stream_index >= 0 && s->streams[stream_index]->priv_data && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) { |
| 819 | ff_asf_guid mediatype, subtype, formattype; |
| 820 | int size; |
| 821 | avio_skip(pb, 12); |
| 822 | ff_get_guid(pb, &mediatype); |
| 823 | ff_get_guid(pb, &subtype); |
| 824 | avio_skip(pb, 12); |
| 825 | ff_get_guid(pb, &formattype); |
| 826 | size = avio_rl32(pb); |
| 827 | parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size); |
| 828 | consumed += 76 + size; |
| 829 | } |
| 830 | } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) || |
| 831 | !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || |
| 832 | !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) || |
| 833 | !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) || |
| 834 | !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) || |
| 835 | !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) { |
| 836 | int stream_index = ff_find_stream_index(s, sid); |
| 837 | if (stream_index >= 0) { |
| 838 | AVStream *st = s->streams[stream_index]; |
| 839 | uint8_t buf[258]; |
| 840 | const uint8_t *pbuf = buf; |
| 841 | int buf_size; |
| 842 | |
| 843 | avio_skip(pb, 8); |
| 844 | consumed += 8; |
| 845 | if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || |
| 846 | !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) { |
| 847 | avio_skip(pb, 6); |
| 848 | consumed += 6; |
| 849 | } |
| 850 | |
| 851 | buf_size = FFMIN(len - consumed, sizeof(buf)); |
| 852 | avio_read(pb, buf, buf_size); |
| 853 | consumed += buf_size; |
| 854 | ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL); |
| 855 | } |
| 856 | } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) { |
| 857 | int stream_index = ff_find_stream_index(s, sid); |
| 858 | if (stream_index >= 0) { |
| 859 | AVStream *st = s->streams[stream_index]; |
| 860 | int audio_type; |
| 861 | avio_skip(pb, 8); |
| 862 | audio_type = avio_r8(pb); |
| 863 | if (audio_type == 2) |
| 864 | st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; |
| 865 | else if (audio_type == 3) |
| 866 | st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; |
| 867 | consumed += 9; |
| 868 | } |
| 869 | } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) { |
| 870 | int stream_index = ff_find_stream_index(s, sid); |
| 871 | if (stream_index >= 0) { |
| 872 | avio_skip(pb, 12); |
| 873 | if (avio_rl32(pb)) |
| 874 | av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index); |
| 875 | consumed += 16; |
| 876 | } |
| 877 | } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) { |
| 878 | int stream_index = ff_find_stream_index(s, sid); |
| 879 | if (stream_index >= 0) { |
| 880 | AVStream *st = s->streams[stream_index]; |
| 881 | uint8_t language[4]; |
| 882 | avio_skip(pb, 12); |
| 883 | avio_read(pb, language, 3); |
| 884 | if (language[0]) { |
| 885 | language[3] = 0; |
| 886 | av_dict_set(&st->metadata, "language", language, 0); |
| 887 | if (!strcmp(language, "nar") || !strcmp(language, "NAR")) |
| 888 | st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; |
| 889 | } |
| 890 | consumed += 15; |
| 891 | } |
| 892 | } else if (!ff_guidcmp(g, ff_timestamp_guid)) { |
| 893 | int stream_index = ff_find_stream_index(s, sid); |
| 894 | if (stream_index >= 0) { |
| 895 | avio_skip(pb, 8); |
| 896 | wtv->pts = avio_rl64(pb); |
| 897 | consumed += 16; |
| 898 | if (wtv->pts == -1) |
| 899 | wtv->pts = AV_NOPTS_VALUE; |
| 900 | else { |
| 901 | wtv->last_valid_pts = wtv->pts; |
| 902 | if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch) |
| 903 | wtv->epoch = wtv->pts; |
| 904 | if (mode == SEEK_TO_PTS && wtv->pts >= seekts) { |
| 905 | avio_skip(pb, WTV_PAD8(len) - consumed); |
| 906 | return 0; |
| 907 | } |
| 908 | } |
| 909 | } |
| 910 | } else if (!ff_guidcmp(g, ff_data_guid)) { |
| 911 | int stream_index = ff_find_stream_index(s, sid); |
| 912 | if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) { |
| 913 | WtvStream *wst = s->streams[stream_index]->priv_data; |
| 914 | wst->seen_data = 1; |
| 915 | if (len_ptr) { |
| 916 | *len_ptr = len; |
| 917 | } |
| 918 | return stream_index; |
| 919 | } |
| 920 | } else if (!ff_guidcmp(g, /* DSATTRIB_WMDRMProtectionInfo */ (const ff_asf_guid){0x83,0x95,0x74,0x40,0x9D,0x6B,0xEC,0x4E,0xB4,0x3C,0x67,0xA1,0x80,0x1E,0x1A,0x9B})) { |
| 921 | int stream_index = ff_find_stream_index(s, sid); |
| 922 | if (stream_index >= 0) |
| 923 | av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index); |
| 924 | } else if ( |
| 925 | !ff_guidcmp(g, /* DSATTRIB_CAPTURE_STREAMTIME */ (const ff_asf_guid){0x14,0x56,0x1A,0x0C,0xCD,0x30,0x40,0x4F,0xBC,0xBF,0xD0,0x3E,0x52,0x30,0x62,0x07}) || |
| 926 | !ff_guidcmp(g, /* DSATTRIB_PBDATAG_ATTRIBUTE */ (const ff_asf_guid){0x79,0x66,0xB5,0xE0,0xB9,0x12,0xCC,0x43,0xB7,0xDF,0x57,0x8C,0xAA,0x5A,0x7B,0x63}) || |
| 927 | !ff_guidcmp(g, /* DSATTRIB_PicSampleSeq */ (const ff_asf_guid){0x02,0xAE,0x5B,0x2F,0x8F,0x7B,0x60,0x4F,0x82,0xD6,0xE4,0xEA,0x2F,0x1F,0x4C,0x99}) || |
| 928 | !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) || |
| 929 | !ff_guidcmp(g, /* dvr_ms_vid_frame_rep_data */ (const ff_asf_guid){0xCC,0x32,0x64,0xDD,0x29,0xE2,0xDB,0x40,0x80,0xF6,0xD2,0x63,0x28,0xD2,0x76,0x1F}) || |
| 930 | !ff_guidcmp(g, /* EVENTID_ChannelChangeSpanningEvent */ (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) || |
| 931 | !ff_guidcmp(g, /* EVENTID_ChannelInfoSpanningEvent */ (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) || |
| 932 | !ff_guidcmp(g, /* EVENTID_ChannelTypeSpanningEvent */ (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) || |
| 933 | !ff_guidcmp(g, /* EVENTID_PIDListSpanningEvent */ (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) || |
| 934 | !ff_guidcmp(g, /* EVENTID_SignalAndServiceStatusSpanningEvent */ (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) || |
| 935 | !ff_guidcmp(g, /* EVENTID_StreamTypeSpanningEvent */ (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) || |
| 936 | !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) || |
| 937 | !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) || |
| 938 | !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) || |
| 939 | !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
| 940 | !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) || |
| 941 | !ff_guidcmp(g, ff_index_guid) || |
| 942 | !ff_guidcmp(g, ff_sync_guid) || |
| 943 | !ff_guidcmp(g, ff_stream1_guid) || |
| 944 | !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) { |
| 945 | //ignore known guids |
| 946 | } else |
| 947 | av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g)); |
| 948 | |
| 949 | avio_skip(pb, WTV_PAD8(len) - consumed); |
| 950 | } |
| 951 | return AVERROR_EOF; |
| 952 | } |
| 953 | |
| 954 | static int read_header(AVFormatContext *s) |
| 955 | { |
| 956 | WtvContext *wtv = s->priv_data; |
| 957 | int root_sector, root_size; |
| 958 | uint8_t root[WTV_SECTOR_SIZE]; |
| 959 | AVIOContext *pb; |
| 960 | int64_t timeline_pos; |
| 961 | int ret; |
| 962 | |
| 963 | wtv->epoch = |
| 964 | wtv->pts = |
| 965 | wtv->last_valid_pts = AV_NOPTS_VALUE; |
| 966 | |
| 967 | /* read root directory sector */ |
| 968 | avio_skip(s->pb, 0x30); |
| 969 | root_size = avio_rl32(s->pb); |
| 970 | if (root_size > sizeof(root)) { |
| 971 | av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n"); |
| 972 | return AVERROR_INVALIDDATA; |
| 973 | } |
| 974 | avio_skip(s->pb, 4); |
| 975 | root_sector = avio_rl32(s->pb); |
| 976 | |
| 977 | seek_by_sector(s->pb, root_sector, 0); |
| 978 | root_size = avio_read(s->pb, root, root_size); |
| 979 | if (root_size < 0) |
| 980 | return AVERROR_INVALIDDATA; |
| 981 | |
| 982 | /* parse chunks up until first data chunk */ |
| 983 | wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16); |
| 984 | if (!wtv->pb) { |
| 985 | av_log(s, AV_LOG_ERROR, "timeline data missing\n"); |
| 986 | return AVERROR_INVALIDDATA; |
| 987 | } |
| 988 | |
| 989 | ret = parse_chunks(s, SEEK_TO_DATA, 0, 0); |
| 990 | if (ret < 0) |
| 991 | return ret; |
| 992 | avio_seek(wtv->pb, -32, SEEK_CUR); |
| 993 | |
| 994 | timeline_pos = avio_tell(s->pb); // save before opening another file |
| 995 | |
| 996 | /* read metadata */ |
| 997 | pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16); |
| 998 | if (pb) { |
| 999 | parse_legacy_attrib(s, pb); |
| 1000 | wtvfile_close(pb); |
| 1001 | } |
| 1002 | |
| 1003 | /* read seek index */ |
| 1004 | if (s->nb_streams) { |
| 1005 | AVStream *st = s->streams[0]; |
| 1006 | pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16); |
| 1007 | if (pb) { |
| 1008 | while(1) { |
| 1009 | uint64_t timestamp = avio_rl64(pb); |
| 1010 | uint64_t frame_nb = avio_rl64(pb); |
| 1011 | if (avio_feof(pb)) |
| 1012 | break; |
| 1013 | ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size, |
| 1014 | 0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME); |
| 1015 | } |
| 1016 | wtvfile_close(pb); |
| 1017 | |
| 1018 | if (wtv->nb_index_entries) { |
| 1019 | pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16); |
| 1020 | if (pb) { |
| 1021 | int i; |
| 1022 | while (1) { |
| 1023 | uint64_t frame_nb = avio_rl64(pb); |
| 1024 | uint64_t position = avio_rl64(pb); |
| 1025 | if (avio_feof(pb)) |
| 1026 | break; |
| 1027 | for (i = wtv->nb_index_entries - 1; i >= 0; i--) { |
| 1028 | AVIndexEntry *e = wtv->index_entries + i; |
| 1029 | if (frame_nb > e->size) |
| 1030 | break; |
| 1031 | if (position > e->pos) |
| 1032 | e->pos = position; |
| 1033 | } |
| 1034 | } |
| 1035 | wtvfile_close(pb); |
| 1036 | st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp; |
| 1037 | } |
| 1038 | } |
| 1039 | } |
| 1040 | } |
| 1041 | |
| 1042 | avio_seek(s->pb, timeline_pos, SEEK_SET); |
| 1043 | return 0; |
| 1044 | } |
| 1045 | |
| 1046 | static int read_packet(AVFormatContext *s, AVPacket *pkt) |
| 1047 | { |
| 1048 | WtvContext *wtv = s->priv_data; |
| 1049 | AVIOContext *pb = wtv->pb; |
| 1050 | int stream_index, len, ret; |
| 1051 | |
| 1052 | stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len); |
| 1053 | if (stream_index < 0) |
| 1054 | return stream_index; |
| 1055 | |
| 1056 | ret = av_get_packet(pb, pkt, len - 32); |
| 1057 | if (ret < 0) |
| 1058 | return ret; |
| 1059 | pkt->stream_index = stream_index; |
| 1060 | pkt->pts = wtv->pts; |
| 1061 | avio_skip(pb, WTV_PAD8(len) - len); |
| 1062 | return 0; |
| 1063 | } |
| 1064 | |
| 1065 | static int read_seek(AVFormatContext *s, int stream_index, |
| 1066 | int64_t ts, int flags) |
| 1067 | { |
| 1068 | WtvContext *wtv = s->priv_data; |
| 1069 | AVIOContext *pb = wtv->pb; |
| 1070 | AVStream *st = s->streams[0]; |
| 1071 | int64_t ts_relative; |
| 1072 | int i; |
| 1073 | |
| 1074 | if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE)) |
| 1075 | return AVERROR(ENOSYS); |
| 1076 | |
| 1077 | /* timestamp adjustment is required because wtv->pts values are absolute, |
| 1078 | * whereas AVIndexEntry->timestamp values are relative to epoch. */ |
| 1079 | ts_relative = ts; |
| 1080 | if (wtv->epoch != AV_NOPTS_VALUE) |
| 1081 | ts_relative -= wtv->epoch; |
| 1082 | |
| 1083 | i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags); |
| 1084 | if (i < 0) { |
| 1085 | if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) { |
| 1086 | if (avio_seek(pb, 0, SEEK_SET) < 0) |
| 1087 | return -1; |
| 1088 | } else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) { |
| 1089 | if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0) |
| 1090 | return -1; |
| 1091 | } |
| 1092 | if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0) |
| 1093 | return AVERROR(ERANGE); |
| 1094 | return 0; |
| 1095 | } |
| 1096 | if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0) |
| 1097 | return -1; |
| 1098 | wtv->pts = wtv->index_entries[i].timestamp; |
| 1099 | if (wtv->epoch != AV_NOPTS_VALUE) |
| 1100 | wtv->pts += wtv->epoch; |
| 1101 | wtv->last_valid_pts = wtv->pts; |
| 1102 | return 0; |
| 1103 | } |
| 1104 | |
| 1105 | static int read_close(AVFormatContext *s) |
| 1106 | { |
| 1107 | WtvContext *wtv = s->priv_data; |
| 1108 | av_freep(&wtv->index_entries); |
| 1109 | wtvfile_close(wtv->pb); |
| 1110 | return 0; |
| 1111 | } |
| 1112 | |
| 1113 | AVInputFormat ff_wtv_demuxer = { |
| 1114 | .name = "wtv", |
| 1115 | .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"), |
| 1116 | .priv_data_size = sizeof(WtvContext), |
| 1117 | .read_probe = read_probe, |
| 1118 | .read_header = read_header, |
| 1119 | .read_packet = read_packet, |
| 1120 | .read_seek = read_seek, |
| 1121 | .read_close = read_close, |
| 1122 | .flags = AVFMT_SHOW_IDS, |
| 1123 | }; |